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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Failure to have both testis (gonads) descend






2. Milk ~305 days - dry 60 days prior to calving






3. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






4. When are dairy cattle dehorned?






5. Check feet and legs - look for masculine traits in build such as crest and muscling






6. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






7. Animal which has been castrated after puberty






8. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






9. Way to know everything is alright with the breeding male






10. Birthing process (termination of gestation)






11. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






12. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






13. 14-19 (17) days






14. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






15. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






16. Superior genes are _______ to multiply






17. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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18. When are steers and heifers weaned from bottle feeding?






19. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






20. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






21. Way to know everything is alright with the breeding male






22. Larger the cow - more milk is produced; smaller the cow - less milk is produced






23. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






24. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






25. Provide nourishment for the developing sperm






26. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






27. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






28. 283 days






29. Check feet and legs - look for masculine traits in build such as crest and muscling






30. Parturition is controlled by...






31. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






32. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






33. Days which have decreasing daylight hours

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34. Depository for semen during insemination. where urine leaves the body






35. What about the sperm for a bull which has been castrated but still has testicles?






36. Animals which have only one estrous cycle (ex: dog - fox)






37. Sperm production






38. Can survive ~7 days in cow. vast majority <48 hours






39. 30-38 hours after estrus cycle begins






40. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






41. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






42. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






43. Animals which have many estrous periods per year (ex: cow - sow)






44. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






45. Actual heat cycle (period)






46. Days which have decreasing daylight hours

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47. Failure to have one testis (gonad) to descend






48. Not under a timeline - cow can not be sold as steak






49. 16-20 hours






50. Prevent the cow from getting an infection from the calve